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2 Sheets-Sheet 1.

'(No Model.)

R. ADAMS.

WINDOW.

No. 310,355. Patented Jan. 6, 1885.

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R. ADAMS.

(No Model.)

WINDOW.

No; 310,355. Patented Jan. 6, 1885.

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`UNITED STATES PATENT OFFICE.

ROBERT ADAMS, OF 17 BLAOKMAN STREET BOROUGH, COUNTY OF SURREY, ENGLAND.

WINDOW.

SPECIFICATION forming part of Letters Patent No. 310,355, dated January6, 1885.

Application iiled June 7,1884. (No model.) Patented in England March 15,1884, No. 4,934.

To @ZZ whom t may concern:

Beit known that I, ROBERT ADMs, a subject of the Queen of GreatBritaimresiding at 17 Blackman Street Borough, in the county of Surrey,England, engineer, have invented certain new and useful Improvements inConvertible Vindow Sashes, (for which I have obtained a patent in GreatBrita-in, No. 4,9%, dated March 15, 1881,) of which the following is aspecification.

My improvements relate to sliding sashes of windows which are capable ofbeing converted into swing sashes for convenience in cleaning orrepairing, and also for purposes or" ventilation. I divide thesash-stile vertically on each side, at or near the level of the bead,into two parts. One part t-s into the ordinary groove formed by beads,and is guided in its vertical motions in such groove by the front, back;and parting beads. The two portions of the stile are united at or nearthe center, or at any other convenient part, by a pivot forming aswingcenter. The sliding portion of the stile is iitted with the usualwindow-cord, to which theusual balanceweight is attached.

In the accompanying drawings,Figure 1 is a horizontal section of awindow-casing and two sashes fitted therein, showing my inventionapplied thereto. Figs. 2 and are detail sectional views of the means forlocking the swinging sash-section of thesliding stile. Figs. et lo 8,inclusive, are other detail views.

a a is the upper sash in section. b b is the upper side of the lowersash. c care the sashweights. (Z cl are the lines which show where thesash-stile is divided into two vertical parts, and c2 are the centralpivots for connecting said divided stile and allowing one part to turnupon the other. Springs g g are fitted on said center pivots to separateor throw apart the two portions of the stiles when it is desired toswing the sash on its centers. The action of the spring is counteractedby the eccentric lever h, which is pinned to the center pivot, c2. NVhenthe leverph is raised, as shown in Fig. 2, the two parts of the stileare separated, and when the lever It is lowered, as shown in Fig. 3, thetwo portions are drawn together and the spring g is compressed. 5( Thisarrangement may also be used without the spring, as it is generallyfound to release the sash suflicientl y when the lever 7L is raised.

In Fig. 4 is shown a draftstop, which is held in its place by one ormore springs in the 5g groove m, which keeps the stop n in the groovem',- but when the sash is rotated the stop is compelled to yield, thesprings allowing it to recede into the groove.

Fig. 5 shows another form of draft-stops, 6( which may be used inconjunction with the pivots shown in Figs. 1, 2, and 3, the two parts ofthe stile being separated before swinging the sash. One stop only mayalso be used.

l Fig. 6 shows two forms of hook for the 6 purpose of keeping theportions of the sashstile together. This is generally applied near thetop or bottom of the stile; and Fig. 7 shows another mode of keeping thetwo parts of the stile together, applicable to the ends of 7 the stile.A staple, o, is inserted, as shown,

a side view of the same staple being shown below the gure, which staplebeing driven in retains the parts draft-proof- Eig. 8 shows anothermethod of drawing to- 7 gether the two portions of the sash-stile, whichis effected in the act of closing the sash. The ton gue p clinches theslip r, and thereby draws the two portions into close contact.

I claim- 8 1. In convertible window sashes, the co1nbination of thepivots or center-pins e2 and eccentric lever h with the dividedsash-stile or duplex frame, substantially as set forth.

2. In convertible window sashes, the com- 8 bination of the pivots orcenter-pins e2, the encircling springs g, and eccentric levers IL withthe divided sash-stile or duplex frame, substantially as herein setforth.

In testimony whereof I have 'hereunto set 9 my hand this 26th day ofMay, 1884.

ROBERT ADAMS.

Vitnesses:

GEO. C. DowNING,

8 Quality Ot., London.. JOHN DEAN,

17 Graccchurch Street, London..

